YES, MR. GREENSPAN, SIR

IGNORE THE FED CHAIRMAN AT YOUR PERIL

O.K., write this down and post it on the refrigerator: the next time Alan Greenspan says "duck," I will duck. And I will be plain tickled that he didn't say "quack," because if he had, I'd jump in a puddle and do that too. Greenspan is the powerful chairman of the Federal Reserve, the nation's central bank, but until recently he was looking like the Rodney Dangerfield of the bull market. Three times in three months he implored investors to rethink their love affair with stocks, starting with his "irrational exuberance" speech in December. Yet stock prices danced defiantly higher atop...